Improvement in stereotype-molds



manner.

UNITED STATES PATENT OFFICE.

LOUIS GEX, OF NEW YORK, N. Y., ASSIGNOE TO R. HOE 86 CO., OF SAME PLAGE.

IMPROVEMENT IN STEREOTYPE-MOLDS.

Speciication forming part of Letters Patent No. 116,304, dated June 27,1871.

To all whom it may concern:

Be it known that I, LOUIS GUEX, of New York, in the county and State ofNew York, have invented certainnew and useful Improvements inMolding-Gases for Stereotypers7 Use, of which the following is aspecification:

My invention consists in constructing.;` the molds used by stereotypersto hold the matrix from which the stereotype plates are cast with a surface of soap-stone, the object of which is to have the surface ofthemold'in contact with the met-al an-d the matrix of such character thatthe plate, after being cast, will readily separate from it, and alsothat anyT moisture between the bottom ofthe matrix and the face of themold in contact with it may be absorbed.

Figure l is a side elevation of a stereotypeplate mold constructed inaccordance with my invention. Fig. -2 is a similar view with thecover ofthe mold raised and the mold turned to a horizontal position to receivethe matrix. Fig. 3 is a back view'of a portion of the mold, showing thearrangement of the catches for holding the mold in a horizontalposition.

The mold is made of iron, and balanced in bearings B inthe frame A so asto maintain a nearly perpendicularposition, as represented in Fig. l.The two parts ofthe mold are hinged together at b, and are pro videdwith stops c c to hold `'the cover G when turned back, as in Fig. 2. The

plates a c are composed of soap-stone, and are att-ached to the ironplates C U in any suitable The catch c is secured to the trip-lever G,and is so arranged that when the mold is turned to a horizontal positionit will engage with the catch j' and hold the mold ldown to receive thematrix or to allow the cast plate to be removed. The clamp-bar E ispivoted at one end to the upright post D, and is provided with a hook,d, on the other end, which embraces the head of the post on the otherside of the mold, (not shownin the drawing.) It has a screw, F, working`through it, which serves to secure the cover in place.

When the mold is used, it is held in a horizontal position by thecatches ef, and the cover is thrown up. The matrix is then laid on, andthe gauge-bars H adjusted to govern the thickness of the plate to becast. The cover is closed and secured by the clamp-bar E and screw F,and the mold turned to an upright position to receive the metal. In theuse of molds composed entirely of metal it is necessary to have a layerof paper interposed between the metal that is poured into the mold andthe surface ofthe cover. This layer is pasted upon the inner face of thecover, and requires to be removed whenever it becomes loosened or burnedoli. By employing a soap-stone surface I am enabled to dispense with theuse of the layer of paper, and also to prevent the formation of steambetween the surface of the mold and the matrix in contact with I claim-As an improvement in stereotype-moldin g cases the use of soap-stoneplates a c, constructed substantially as and for the purposes set forthand specified.

LOUIS GUEX.

Witnesses v SAMUEL P. BELL, JNO. H. LooKwooD.

